cretaceous : Idioms & Phrases

Index

Cretaceous acid

  • an old name for carbonic acid.
Webster 1913

Cretaceous formation

  • (Geol.), the series of strata of various kinds, including beds of chalk, green sand, etc., formed in the Cretaceous period; called also the chalk formation. See the Diagram under Geology.
Webster 1913

Cretaceous period

  • noun from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants
    Cretaceous.
WordNet
  • (Geol.), the time in the latter part of the Mesozoic age during which the Cretaceous formation was deposited.
Webster 1913